If you're interested, i have a set of aluminum full roller rockers that i don't need now since I'm going LS. They are 1.5 ratio, and clearanced for up to 1.436" springs, and mounted on 3/8" studs i believe. Ran them for years with a 488/510 lift cam with no issues. Here's a pic for reference.
Pm me if interested.
Pm me if interested.